{ Класс поля данных объекта

  Module is a part of project http://code.google.com/p/drivers-training-request
  Copyright (C) 2012 Leonid Vlasov leoniv@bk.ru

  This source is free software; you can redistribute it and/or modify it under
  the terms of the GNU General Public License as published by the Free
  Software Foundation; either version 2 of the License, or (at your option)
  any later version.

  This code is distributed in the hope that it will be useful, but WITHOUT ANY
  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  details.

  A copy of the GNU General Public License is available on the World Wide Web
  at <http://www.gnu.org/copyleft/gpl.html>. You can also obtain it by writing
  to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  MA 02111-1307, USA.
}
{ TFieldData }
//Связыват поле объекта с виджетом на форме
TFieldData = Class
 FValue:String;
 FWidget:TWinControl;
private
  function GetValue:String;
  procedure SetValue(AValue:String);
  procedure SetWidget(AWidget: TWinControl);
 public
  property Value:String read GetValue write SetValue;
  property Widget:TWinControl read FWidget write SetWidget;
end;



{ TDataField }
TDataField = Class(TFieldDescriptor)
   FData:TFieldData;
private
  function GetValue: String;
  procedure SetValue(AValue: String);
  procedure SetWidget(AValue: TWinControl);
   public
      constructor Create(AName, ACAption: String;AType: TBaseFieldType);overload;
      constructor Create(AName,ACAption:String;Pattern:TFieldDescPattern);overload;//Создание по шаблону
      destructor Destroy; override;
      property Widget:TWinControl read FData.FWidget write SetWidget;
      //Overriden
      //Валидация значения
      function Validate(Var Couse:string):Boolean;
      //Конвертация
      function ToXMLString():String;
      function ToXMLNode(Const XMLDoc:TXMLDocument):TDOMElement;
      function ToSQLString():String;
      procedure FromXMLNode(Node:TDOMElement);
      procedure FromSQLFildVAlue(Const SQLVAlue:TDataSetField);
      property Value:String read GetValue Write SetValue;
end;

